. >> what about china's book, continental border with russia? what about china buying to siberia. i'm colonizing siberia, sending out some of these people -- how to separate the united states? how does that worry the united states? actually, china getting stronger unaccounted siberia? >> i haven't heard any proposals for china to buy parts of siberia. [laughter] their border issues, but i haven't heard any proposals. investment -- well, the united states very much once a prosperous china, but we also want a prosperous china that assumes greater responsibilities and engagement throughout the world commensurate with the capabilities and economic power. we don't want china simply to grow and take a free ride or get a free ride on everything else that's happening around the world, that china needs to set the intake are responsible when managing international affairs, with its conflicts in africa to the middle east, to north korea and elsewhere. so we are seeing some of that already. there is good cooperation on many issues, including afghanistan, engagement with china on issues of nor